Improvement in ore-crushing mills



J. MOURE.

Ore Crusher.

Patented May 6, 1862.

UNITED STATES PATENT OFFICE.

THE

VIIIA IRON XVORKS CO., OF SAME PLACE.

IMPROVEMENT IN ORE-CRUSHING MILLS.

Speciilcation forming' part oli' Letters Patent No. 35,202, dated May 6, 1862.

To all whom it mfr/y concern.-

Be it known that I, JOSEPH MOORE, of the city and county of San Francisco and State of California, have invented a` new and useful Machine for Stamping' or (lrl'lshing Metallic i Orcs in a Dry State; and I do hereby ,leclare that the followingl is a full, clear, and exact' description of the same, reference being had to the annexed drawings, making'V a part of this specification, in which- Figure l is a front elevation ot' my invention; Fig. 2, a side elevation of the saine; Fig. 3, a detached plan or top view of the guide for the stamper-rods; Fig'. 4, adetached top view of the mortar-bed and `grate; Fig'. 5, a longitudinal vertical section of the saine; Fig. t, a transverse vertical section ot' the saine.

Similar letters ot' reference irulicate correspendingI parts in the several iigures.

The object of this invention is to obtain a simple and eiiicient machine Afor crushing' or stamping' metallic ores in a dry state, one which, by a continuous operation, will pul verize the ore and sift or screen the sanie, so as to separate the sufficiently line from the coarse particles and return the latter to the i stainpers 'for Yfurther reduction, while the sufficientlytnc and pulverized part is discharged from the machine.

The invention consists in the employment or use ot' a series of stanlpers and mortar provided with a grating', a set ot' elevators, and a screen, arranged substantially as hereinafter shown and described, whereby the desired end is attained.

To enable those skilled in the art to fully ln'idersl'ainl and construct my invention, Ij will proceed to describe it.

A represents a cam-shall, which may be driven, as usual, by a pulley. E, or by gearing. On the shatt A. the cams (I arel keyed in any proper way, and al sin-h )mints as to act upon hubs or collars l), which are secured on rods E ot' stampers F.

a mortar-bed, in. which a` `grating, Il, is laid. This grating,l maybe formed ot' wrought iron or steel bars placed transversely in the bed, as shown clearly in Fig. t, or perforarited l dies or plates of cast-iron may be used t'or a y grating.

In the mortar-bed G there are fastened four wrought-iron upright rods, I, one at each corner or angle of the mortar-bed. These rods form the traine of the machine, and they are stiitened by wrought-iron cross-braces J, which are iitted at their ends in taper sockets a on the cast-inetal portions of the structure.

To the upright rods I are attached brackets K Ii of cast metal, said brackets containing' the bearings b of the can-shaft A and their caps, and also having the upper sockets, a, of the cross-braces J at their sides.

The upper and lower guides, L L, of the stainper-rods E may be secured to the rods I by side keys or screws. The mortar-bed G is boxed in by sheet-iron shrouding M, bolted and riveted to cast-metal tubes N, which are placed on the upright rods I.

At the front part of the shrouding M there is a hopper, O, and at the back part of the shrouding there is an inclined tube, Q, the lower end of which communicates with the chamber formed by the shrouding; by one or inore apertures.

On the shaft A there is placed a pulley, R, around which a belt, g, passes, said belt also passing around a pulley, T, on a shaft, L', which shaft has the upper pulley, d, of a set of elevators, V, upon it. The elevators V may be constructed in the usual way, a leather or flexible endless strap or belt of other material being' placed on suitable pulleys, d e, having; such a relative position with each as to give the strap or belt an inclined position. The elevator strap or belt is provided with suitable caps, and the stra-p and caps are inclosed within a suitable case, IV, the lower end of which communicates with a spout, X,

beneath. the `f grating' II of the niortar-bed G,

and the upper end. is provided with a spout, f, which leads into a rotary screen, Y, said screen being" somewhat inclined and having' its depressed end over the upper end of tube Q. The screen 'Y is rotated by band, g, from a pulley, 7i, on cam-shaft A. Z is a spout placed below screen Y, as shown in Fig. 2.

The operation oi' the machine is as follows: The ore is fed in suitable quantities on the grating' H through the hopper O, and is crushed by the stampers F, the crushed ore passing through the grating' and down spout X into the elevator-caps, which convey the crushed ore upward and deposit it into tho upper end ot the rotating screen Y. The iine portion escapes through the screen, While the coarse portion passes out of the lower end of the screen into spout Q, and is conveyed thereby to the grating Il and subjected to a second crushing operation. Thus it will be seen that the operation is a continuous one, the ore being crushed and the line pulverized portions passing through the screen, While the eoarser portions are returned to the stampers to be recrushed and again screened. The grating H, it will be seen, prevents the escape of large masses of ore into the screen Y. No particles coarser than Vare allowed to pass through the grating Il can pass into the screen. l

By construct-ing the trame as described it is rendered extremely simple, strong, and durable-well calculated to resist concussiens and jars due to the operation of the machine.

l do not claim the employment of one of the stampers l?, for theyhave been previously used; nor do l claim, broadly, the elevators V but l do claim as new and desire to secure by Letters Patentl. The combination of the stampers F, grating H, elevators V, and screen Y, arranged for joint operation, as and t'or the purpose set forth. f

2. The construction of the frame of the machine, to wit: the rods l, braced by the cross-rods J, the shrouc'ling M, attached to rods l to form the mortar-box. and the guides L L, fitted on said rods l, as set forth.

JosEPH Moonn.A

Witn esses:

ARTHUR I'IAINE, GEO. PAR'DY. 

